package com.pkk.blny.web.interceptor;

import com.pkk.blny.model.dto.HaloConst;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

/**
 * <pre>
 *     后台登录控制器
 * </pre>
 *
 * @author : RYAN0UP
 * @date : 2017/12/13
 */
@Component
public class LoginInterceptor implements HandlerInterceptor {

  @Override
  public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
    Object obj = request.getSession().getAttribute(HaloConst.USER_SESSION_KEY);
    //如果user不为空则放行
    if (null != obj) {
      return true;
    }
    //否则拦截并跳转到登录
    response.sendRedirect("/admin/login");
    return false;
  }

  @Override
  public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler,
      ModelAndView modelAndView) throws Exception {
  }

  @Override
  public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex)
      throws Exception {
  }
}
